Sandpapering-machine



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W. BLACK. I 'SANDPAPERING MACHINE.

No. 564,587. v Patented-July 28, 1896.-

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UNITED STATES PATENT OFFICE.

WALTER BLACK,'OF CHICAGO, ILLINOIS.

SANDPAPERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 564,587, dated July 28, 1896.

Application filed October 21,1895. Serial No. 566,351. (No model.)

To all whom it may concern:

Be it known that l, XVALTER BLACK, a citizen of the United States, residing at Chicago, Cook county, Illinois, have invented certain new and useful Improvements in Sandpapering-Machines, of which the following is a specification.

The object of my invention is to provide a simple economical machine for sandpapering wood strips, moldings, and similar articles; and the invention consists in the features and combinations hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of my improvement with one side flange removed and some of the parts in section; Fig. 2, an enlarged sectional view of the rolls of sandpaper, taken on line 2 of Fig. 1 Fig. 3, an enlarged view of a portion of the mechanisn, taken on line 3 of Fig. 1; and Fig. 4, a detail View of a portion of the mechanism, taken at line 4 of Fig. 1.

In the art to which this invention relates has long been desired to sandpaper irregularshaped moldings and in a continuous manner. Various mechanisms have been designed to accomplishthis result, but it has been found almost impossible to do it as economically as by hand and preserve the shape and well-defined contour. The principal object of my invention, therefore, is to overcome all existing defects and produce a simple and efficient machine that will sandpaper moldings and similar articles economically and eiiiciently.

In constructing my improvement I make what I term a drum A,which consists of two flanges a, mounted upon a rotatable shaft A by means of the hubs a. Secured to the drum and between the flanges at equidistant points of a circle are rolls B, which contain strips of sandpaper 0, preferably slitted, (see Fig. 2,) so as to more readily conform to, when in use, different shapes. These rolls or spools are secured to the drum by means of the shouldered bolts 17, circular flanges l7, and nuts 17 19 so that should it become necessary to replace a roll by a new one all that is necessary to do is to remove one of the nuts b take off the flange b, when the spool or roll may be easily removed or a new one inserted.

In order to keep the sandpaper in contact with apiece of molding D to be sandpapered,

I provide a plurality of flexible portions E, one for each of the rolls of sandpaper. In the drawings I have illustrated these flexible portions as consisting of a number of broom-corn brushes arranged tangentially with relation to the rolls, and in order to secure these in position, I mount the handle portion in blocks E. These supporting-blocks are provided with trunnions 2', by which they are pivotally mounted in the flange portions of the drum. To furnish a backing for the brush or yield- /ing portions, I provide curved metal strips Gr, which have one end secured to the supporting-blocks H,,as shown in Fig. 3, by means of the clamps g, and are alsoprovided with inwardly-extending side lugs g for the purpose of strengthening the back as well as guiding and holding it-in the correct plane. Iprovide a second set of clamps G and screws g, by

which the brushes are secured to the back portions, the screws being passed directly through the body of the brushes. Adjacent to each of the supporting-backs I provide rods or bolts H, which are passed through the flanges of the drum or wheel, and which act as a support or limit to the movements of the back portions.

In applying sandpaper for use I bring the free ends 0 out along the upper surface of the brush until it is even with the free ends of the brushes, and in order to secure it there I provide a number of clamps I, (see Fig. 3,)

which are passed across the upper surface of the sandpaper and pressed against it, so as to hold it firmly in contact with the brushes, by means of the securing bolts and nuts 2', which enter the flanged portions of the drum. IV hen the outer free end of the sandpaper is worn, all that is necessary to do in order to have a fresh portion is to loosen the ends of the securing-bolts 2', draw out a fresh portion of the sandpaper, retighten the securing-bolts, and clip off the worn end of the paper. The upper brush of Fig.' 1 is shown in working contact with a piece of molding and a brush pressed against the entire length of its supporting-back.

When it is desired to use my sandpapering apparatus, it may be mounted upon suitable standards orsupports, which I deem un necessary to illustrate, as they are so well known to mechanics. In fact, I have only shown that portion of my invention which I deem best and most necessary to illustrate the improvement, having left off all minor details, as the drum is applicable to many styles of machines.

In operation the drum is rotated in the direction indicated by the arrow and the strip of molding fed steadily, either by hand or a machine, into contact with the sandpaper, pressing the same down to nearly the periphery of the drum. The flexible back portion keeps the sandpaper in contact with all portions of the surface of the molding, be it irregular, of the ogee shape, or be it smooth, and efiiciently finishes the same, giving it a higher degree of finish than it is possible to give it by hand- By making the rolls of sandpaper in narrow strips and securing them together at points about six inches apart the sandpaper is enabled to more readily give and conform to the shape of the moldingthat is, it enables the short strips to drop into the sharp corners or adapt themselves to small curves.

IVhile I have described my invention with more or less minuteness as regards details and as being embodied in certain precise terms, I do not desire to be limited thereto unduly any more than is pointed out in the claims. On the contrary, I contemplate all proper changes in form, construction and arrangement, the omission of parts, and substitution of equivalents as circumstances may suggest or render expedient.

I claim- 1. In a sandpapering-machine, the combination of two or more rolls of sandpaper arranged on a circle and adapted to have their free ends brought into operative position, means for holding and rotating them in that position, and a flexible back for holding the free ends of the sandpaper in operative position, substantially as described.

2. In a sandpapering-machine, the combination of a rotatable supporting-drum, a plurality of rolls of sandpaper arranged on a circle and adapted to have their free ends brought out into operative position, a flexible back for each roll to hold the free ends of the sandpaper in operative position, and a rigid back to limit the movement of the flexible back, substantially as described,

3. In a sandpapering-machine, the combination of a rotatable supporting-drum comprising two flange side portions mounted upon a rotatable shaft, a plurality of rolls of sandpaper mounted in a circle and between the flanged sides of the drum, and adapted to have their free ends brought out into operative position, a flexible back portion for each roll to hold the free ends of the sandpaper in operative position, a rigid back to limit the movement of the flexible portion, and means for keeping the sandpaper in operative engagement with the flexible back, substantially as described.

4. In a sandpapering-machine, the combination of rotatable supporting-drum comprising two flange side portions mounted upon a rotatable shaft, a plurality of rolls of slitted sandpaper removably mounted in a circle between the flanged side portions and adapted to have their free ends brought out into operative position, a brush for each roll and forming aflexible back to hold the free ends of the sandpaper in operative position, a rigid back to limit the movements of the flexible back,

means for securing such back portions together, and means for keeping the sandpaper in operative engagement with the flexible back, substantially as described.

5. In a sandpapering-machine, the combination of a flexible back portion adapted to support and hold sandpaper in operative position, and means for holding and rotating such flexible portion, substantially as described.

6. In a sandpapering-machine, the combination of a flexible back portion having a free protruding end or ends adapted to hold a piece of sandpaper in operative position, means for clamping and holding at least one end of a piece of sandpaper in contact with the flexible backing, and means for rotating the parts, substantially as described.

WALTER BLACK. IVitnesses THoMAs F. SHERIDAN, THOMAS B. McGREGoR. 

